7665145 has 4 divisors (see below), whose sum is σ = 9198180. Its totient is φ = 6132112.

The previous prime is 7665143. The next prime is 7665149. The reversal of 7665145 is 5415667.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2301289 + 5363856 = 1517^2 + 2316^2 .

It is a cyclic number.

It is not a de Polignac number, because 7665145 - 2¹ = 7665143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7665145.

It is not an unprimeable number, because it can be changed into a prime (7665143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 766510 + ... + 766519.

It is an arithmetic number, because the mean of its divisors is an integer number (2299545).

Almost surely, 2^7665145 is an apocalyptic number.

It is an amenable number.

7665145 is a deficient number, since it is larger than the sum of its proper divisors (1533035).

7665145 is a wasteful number, since it uses less digits than its factorization.

7665145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533034.

The product of its digits is 25200, while the sum is 34.

The square root of 7665145 is about 2768.5998266272. The cubic root of 7665145 is about 197.1696769655.

The spelling of 7665145 in words is "seven million, six hundred sixty-five thousand, one hundred forty-five".